feat: build CLI core framework with Commander.js

Add CLI entry point with Commander.js, config management (~/.mcpctl/config.json
with Zod validation), output formatters (table/json/yaml), config and status
commands with dependency injection for testing. Fix sanitizeString regex ordering.
67 tests passing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/tests/config/schema.test.ts

@@ -0,0 +1,52 @@
+import { describe, it, expect } from 'vitest';
+import { McpctlConfigSchema, DEFAULT_CONFIG } from '../../src/config/schema.js';
+
+describe('McpctlConfigSchema', () => {
+  it('provides sensible defaults from empty object', () => {
+    const config = McpctlConfigSchema.parse({});
+    expect(config.daemonUrl).toBe('http://localhost:3000');
+    expect(config.registries).toEqual(['official', 'glama', 'smithery']);
+    expect(config.cacheTTLMs).toBe(3_600_000);
+    expect(config.outputFormat).toBe('table');
+    expect(config.httpProxy).toBeUndefined();
+    expect(config.httpsProxy).toBeUndefined();
+    expect(config.smitheryApiKey).toBeUndefined();
+  });
+
+  it('validates a full config', () => {
+    const config = McpctlConfigSchema.parse({
+      daemonUrl: 'http://custom:4000',
+      registries: ['official'],
+      cacheTTLMs: 60_000,
+      httpProxy: 'http://proxy:8080',
+      httpsProxy: 'http://proxy:8443',
+      outputFormat: 'json',
+      smitheryApiKey: 'sk-test',
+    });
+    expect(config.daemonUrl).toBe('http://custom:4000');
+    expect(config.registries).toEqual(['official']);
+    expect(config.outputFormat).toBe('json');
+  });
+
+  it('rejects invalid registry names', () => {
+    expect(() => McpctlConfigSchema.parse({ registries: ['invalid'] })).toThrow();
+  });
+
+  it('rejects invalid output format', () => {
+    expect(() => McpctlConfigSchema.parse({ outputFormat: 'xml' })).toThrow();
+  });
+
+  it('rejects negative cacheTTLMs', () => {
+    expect(() => McpctlConfigSchema.parse({ cacheTTLMs: -1 })).toThrow();
+  });
+
+  it('rejects non-integer cacheTTLMs', () => {
+    expect(() => McpctlConfigSchema.parse({ cacheTTLMs: 1.5 })).toThrow();
+  });
+});
+
+describe('DEFAULT_CONFIG', () => {
+  it('matches schema defaults', () => {
+    expect(DEFAULT_CONFIG).toEqual(McpctlConfigSchema.parse({}));
+  });
+});